Simple operation K6

function k6

Run local tests

Copy the following code , Save as script.js

import http from 'k6/http';
import {
     sleep } from 'k6';

export default function () {
    
    http.get('https://test.k6.io');
    sleep(1);
}

Began to run

1.Linux CLI

k6 run script.js

2.Docker run

docker run -i loadimpact/k6 run - <script.js

3.Windows docker run

PS C:\> cat script.js | docker run -i loadimpact/k6 run -

The effect is as follows

Add more VUs( user )

Try to use 10 Virtual users and slightly longer duration to run load tests

1.Linux CLI

k6 run --vus 10 --duration 30s script.js

2.Docker run

docker run -i loadimpact/k6 run --vus 10 --duration 30s - <script.js

3.Windows docker run

PS C:\> cat script.js | docker run -i loadimpact/k6 run --vus 10 --duration 30s -

It's defined in JavaScript In file

import http from 'k6/http';
import {
     sleep } from 'k6';
export let options = {
    
    // vus -->  user 
    vus: 10,
    // duration -->  The duration of the 
    duration: '30s',
};
export default function () {
    
    http.get('http://test.k6.io');
    sleep(1);
}

As the time period decreases vus

import http from 'k6/http';
import {
     check, sleep } from 'k6';

export let options = {
    
  stages: [
    {
     duration: '30s', target: 20 },
    {
     duration: '1m30s', target: 10 },
    {
     duration: '20s', target: 0 },
  ],
};

export default function () {
    
  let res = http.get('https://httpbin.org/');
  check(res, {
     'status was 200': (r) => r.status == 200 });
  sleep(1);
}

The effect is as follows

Results output

standard output , It will show k6 Signs and the following test information ：

• Test details ： General test information and load options .
• Progress bar ： Test status and how much time has passed .
• Test summary ： test result （ After the test is completed ）. from k6 v0.30.0 Start , You can completely customize the output and redirect it to a file . You can also save any file using a machine-readable version of the summary , Such as JSON、XML（ for example JUnit、XUnit etc. ）, Even well formed for humans HTML The report ！ For more details , See handle summary () file .

Details of operating parameters

• execution： Local Show k6 Execution mode （ Local or cloud ）.

• output： - It is the output of granularity test results . By default , Do not use any output , Only the summary of the end of the test summarized .

• script： route / To /script.js Displays the name of the script file being executed .

• scenarios：… Is a summary of the scenario in which this test run will be executed and some overview information ：

  • (100.00%) Is the execution segment used

  • 50 The biggest VU Tell us how much will be used in all scenarios VU（ Virtual user ）.

  • Maximum duration 5 branch 30 Seconds is the longest time for the script to run , Including any normal stop time .

• default： … Describes the only scenario for this test run . under these circumstances , It is a slope VU Scenario of actuator , Use the stage shortcut option instead of the scene long format option .

External output

Use --out Export to external

Currently, the built-in available types are ：cloud、csv、influxdb、json、statsd

# demonstration :  Output into json,  And save to  test.json  In file 
k6 run --out json=test.json script.js

Of course It also supports multi output

k6 run --out json=test.json \
--out csv=test.csv script.js

Refer to official documentation

Official document address : https://k6.io/docs/